make Active sentences to Passive
simple past:
1)She sang a song.
2)We stopped the bus.
3) A thief stole my car.
4)They didn't let him go.
5) She didn't win the prize.
6) I did not tell them.
7)Did he send the letter?

1. A song was sung.2. The bus was stopped.3. My car was stolen by a thief.4. He was not allowed to go.5. The prize wasn't won.6. They were not told.7. Was the letter sent?